Fan



L. H. SOHN.

FAN.

APPLICATION FILED JUNE I6. I920.

Patented Sept. 20, 1921.

2 SHEETSSHEET I.

llVl/E/VTUR 4.11. 15077274 ATTORNEYS PATENT OFFICE.

LOUIS HERMAN SOHN, OF HURON, SOUTH DAKOTA.

FAN.

Application filed June 16,

To all whom it may concern:

Be it known that I, LOUIS HERMAN SOHN, a citizen of the United States, and a resident of Huron, in the county of Beadle and State of South Dakota, have invented certain new and useful Improvements, in Fans, of which the following is a specification.

M invention is an improvement in fans, -and as for its object to provide a fan es ecially adapted foruse with motor vehic es, wherein the fan has blades which are adjustable to vary the inclinationof the blades with respect to the axis on which the fan rotates, to permit the fan to be adapted for different weather conditions, and wherein mechanism is provided for permitting said fan to be adjusted from t e seat of the vehicle.

In the drawings:

Figure 1 is a side view of the improved fan in place on a motor vehicle;

Fig. 2is a longitudinal vertieal section through the fan;

Fig. 3 is a front view of the fan;

Fig. 4 is a front view of one of the blades;

Fig. 5 is a section on the line 5-5 of Fig. 2.

The present embodiment of the invention is shown in connection with a motor vehicle, indicated generally at 1, and the improved fan comprises a hub 2 which is mounted on a shaft 3, and the hub carries a pulley 4 which is connected by a belt 5 with a pulley 6 on the motor shaft 7 to drive the fan. The pulley 4 is supported about the hub in spaced relation to the same by means of a plurality of radially arranged fastening.

ins. p A rim 8 is provided for the fan, and this rim is connected to the hub and held in spaced relation'x, with respect thereto by means of spokes" 9.

The fan blades 10, of which there are six in the present instance, are arranged betweenthe spokes and between the hub and the rim. Each of these blades has a shaft 11 extending longitudinally thereof at the center, and the outer end of each shaft is journaled in a bearing bracket 12 secured to therim, the inner end being journaled in the hub, as indicated at 13. he inner end of each shaft has a pinion 14, and mechanism is provided engaging the pinions for simultaneously adjusting all of the blades.

Specification of Letters Patent.

Patented Sept. 20, 1921.

1920. Serial No. 389,448.

The said mechanism comprises a series of rack bars 15, one bar for each pinion, and

the bars are mounted to slide longitudinally of the hub, being all connected with a collar 16 mounted on the hub. This collar has a pair of annular ribs 17,'forming .between them an annular groove, which is engaged by the arms 18 of a fork 19. p

This fork is pivoted intermediate its ends to a fixed support 20 on the motor bed of the vehicle, and a link 21 connects the outer end of the shaft with a latch lever 22. The latch lever is pivoted to a toothed quadrant 23 held on the body of the vehicle adjacent to the seat, the latch of the'lever bein held in engagement with teeth ofthe qua rant by means of spring mechanism, as shown.

In operation, when it is desired to-change the pitch of the blads, the lever is released from the quadrant and is moved to swing the yoke 19. The collar 16 is moved longitudinally of the hub, and the rack bars, being integral therewith, rotate the pinions 14, turning the shafts 11 and the blades. Thus all of the blades are simultaneously rotated.

As illustrated in Fig. 5, the radially arranged pins which connect the pulley 4 to the hub constitute a stop element for limiting the forward movement of the collar 16. By reason of the fact that the collar 16 is limited in its forward movement, the blades of the fan are limited in their turning movement and are prevented from turning completely around so as to reverse the air current produced by the fan.

I claim:

1. A fan including a rim and a hub of elongated formation, spokes rigidly connected to the rim and to the forward portion of the hub, blades having v ivot elements connected to the rim and t e hub, a collar slidably and rotatably mounted on said hub rearwardly of said blades, and having-racks slidable on said hub, pinions mounted on said pivot elements and engaged by said racks, whereby the movement of the rack results in the rotation of said blade, a pulley surrounding the said hub and racks, and having radial pins connected to said hub, said collar being provided with a roove, and a lever having branches extending into said groove for movin said collar longitudinally on said hub, sai radial'pins constituting a stop element for limiting the forward movement of the racks and the turning of the blades.

2. A fan including a hub, blades having 5 pivot elements connected to the hub, a collar slidably and rotatably mounted on said hub, and having racks arranged about the hub, pinions mounted on said pivot elements and engaged by said racks, a pulley surrounding said hub in spaced relation to the same and having attaching means connected to said hub and constituting stop elements for limiting the movement of said collar and the turning of said blades, and means to adjust the collar on said hub.

- LOUIS HERMAN SOHN. 

